Drinking Water


Where does your drinking water come from? If you live on Cape Cod, your water supply comes from either a municipal or private supply well, fed by groundwater from Cape Cod’s Sole Source Aquifer, one of the most productive groundwater systems in New England.

If you have questions about your municipal drinking water, you should always contact your water supplier directly. If you use a private well and want to test your water, visit the Barnstable County Water Laboratory web site, or contact your local health agent for more information.

(or click on the links provided below):
Hyannis Water Division 508-778-6917
Barnstable Fire District 508-362-6498
Centerville-Osterville-Marstons Mills Water Department 508-428-6691
Cotuit Water Department 508-428-2687
Bourne Water District 508-563-2294
Buzzards Bay Water District 508-759-4631
North Sagamore 508-888-1085
Otis Air National Guard Base Water 508-968-4102
Brewster Water Department 508-896-5454
Chatham Water Department 508-593-4766
Dennis Water District 508-398-3351
Falmouth Water Department 508-457-2543
Harwich Water Department 508-432-0304
Mashpee Water District 508-477-6767
Orleans Water Department 508-240-3700
Provincetown Water Department 508-487-7064
Sandwich Water District 508-888-2775
Yarmouth Water Department 508-771-7921


Municipal Suppliers
The Cape Cod Aquifer provides 100% of the Cape’s drinking water. There are 18 separate water districts, or departments across Cape Cod.  Altogether, there are 158 gravel pack water supply wells and one surface reservoir.  Approximately 85% of Cape Cod is serviced with public water.  The Outer Cape communities of Truro, Wellfleet, and Eastham are serviced almost entirely with private or small volume wells.

Water Quantity
Since 2000, public community drinking water suppliers have pumped, on average, about 10.7 billion gallons of groundwater per year from Cape Cod’s Sole Source Aquifer. The graph (left) shows that pumping over the last decade has fluctuated due to seasonal climatic variations, such as rainy summers, but it remains fairly consistent.  A study by the U.S. Geological Survey indicates that groundwater pumping accounts for approximately 10% of the annual recharge from precipitation.

© 2011 Cape Cod Groundwater Guardians

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Cape Cod Groundwater Guardian Team
PO Box 226 Barnstable, MA 02630
508-362-3828 | FAX: 508-362-3136
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